Comments

The lasting solution to this problem is to create a law that bans the sale of goods or services at the door.
If you invite someone to your home, having perused their services - fine
If someone leaves a brochure & returns at your invitation - fine ( Avon, Betterware etc )
Otherwise it should be illegal to cold-call people.
Police, politicians & people everywhere should support this idea, it will protect the vulnerable & put an end to the misery caused by rogue traders & their ilk